Tire.



G. H. LAPPE.

TIRE.

AEPLIUATION FILED AUG. 12, 1912.

Patented Aug. 1 39 9 35 1 ,7QQ4AL g pg. PATEN UFFTQE,

CHARLES H. LAPPE, 0F PITTSBURGH, PENNSYLVANTA.

TIRE.

Patented Aug. 12, H933.

Application filed. August 12, 1912. Serial 1\ To. 714,596.

To all whom it may concern; I

Be it known that 1, CHARLES H. LAPPE, a citizen of the United States ofAmerica, re-

siding at Pittsburgh, in the county of Alle- 5 gheny and Stateof-Pennsylvania, have invented certain new and useful Improvements inTires, ofwhich the following is a specification, reference being hadtherein to the accompanying drawing.

This invention relates to tires, for automobiles and other vehicles,andhas special 7 reference to an improvementin pneumatic tires, wherebythe same shall possess, to the I highest degree attainable, 3.!111-XlII111IIl' 15 strength, integrity, resiliency, endurance,

and ylelding wearing face for tread, to- -gether with maximum resistanceagainst perforation.

A further object of the invention is to provide a novel construction'ofvehicle tire built up in such a manner as to not only effect a greatsaving in rubber, but at the same time to secure an exceptionally toughand cushioned body and tread, producing a 3 tube of great strength andwearing capacity,

and particularly obviating the possibility of blow outs resulting fromhigh internal pneumatic pressure, and also, at times, from the injurytermed F stone bruise.

Another and distinctive object of the present invention is to provideexpansible inner andv outer tubes made of metal, the outer tube havingprovision whereby a tread can be easily secured to the outer tube.

A still further object of this invention is to provide a resilientmetallic tire that is inexpensive to manufacture, and capable ofwithstanding the wear, tear and sljrain imposed upon pneumatic tires inthe lprdinary use thereof upon motor and other vehicles.

With the above and other objects in view the invention resides in thenovel construction, combination and arrangement of parts to behereinafter specifically described and then claimed.

The essential features of the invention, involved in carrying out theobjects above indicated, are necessarily susceptible to a wide range ofstructural modification without departing from the spirit or sacrificingany of the advantages of the invention, but a practical embodimentthereof is suggested in the accompanying drawing,, in which Figure 1 isa cross sectional view of a tire in accordance with this invention. Fig2 is a longitudinal sectional new of a portion of the tire, and Fig. 3is a perspective view and is thin whereby the corru ations or I flutes 2thereof will be suscepti le to a r pressure Within the tube. In otherwords,

the inner tube, when deflated has the walls of the corrugations'closetogether o1',.col-

lapsed, and when inflated the walls of the corrugations are separatedand the innertube expanded to that degree as toform cushion for a weightsupported by the tire. The longitudinal edges of the inner tube areflattened, as at 4 and placed together to at,

Tit?

ford' a suflicient bearing surface of said inner tube upon the rim orfelly of a wheel. Any suitable fastening means can be resorted to forsecuring the inner tube to a wheel and the inner tube is provided witha-valve 5 whereby it can be filled and inflated by air.

6 denotes an outer tube made of materialsimilar to the inner tube. Theouter tube has corrugated side walls and a smooth tread surface '7 thatis provided with transverse ribs 8 formed by depressing the inner sideof the tread 7, these ribs being equally spaced and affording means forsecuring a tread to the surface 7 without any danger of the treadshifting circumferentially ofthe outer tube. The longitudinal edges ofthe outer tube are bent to form hollow flanges Qthat used for securingthe outer tube to a wheel. s

The hollow flanges 9 are formed by bending the edges of the outer tubeoutwardly at an angle, then inwardly in a horizontal plane and thenupwardly until the edges meet the outer tube. Suitably mounted upon thetread surface 7 is a tread plate 10 having transverse depressions 11 toreceive the ribs 8, said depressions also providing ribs that engage ina resilient tread. 12, preferably made of rubber. The outer tube fitsupon the inner tube and the corr are retractable with the cor igationsbfthe inner tube, and both of said tubeseooperate informing a yieldabletire bodythat eliminates to a great degree the use of rubber for tionsthereof cushioning purposes. The rubber-v tread 12 is simply employedfor preventing sharp stones from piercing or penetrating the treadsurface 7 and with both of said tubes made of durable metal theliability of punctures ZLIIdblOW-Ollt-S is reduced to a minimum.

It is thought that the utility of the tire will be apparentwithoutfurther description, and I reserve the right to make such changes in theform, proportion and minor details of construction as fall within thescope of the appended claims.

What I claim is I 1'. A tire comprising inner and outer tubes formed ofsheet metal, said inner, tube having a flat base and its remainingportion longitudinally corrugated throughout, said outer tube bein"split and bent upon itself to provide itsen s with outwardly projectingflan es, said outer tube having its sides lonitu' inally corrugated andfurther includmg a flat tread surface, the corrugations of the outer'tube being alternately disposed with respect to the corrugations of theinner tube, said inner tube positioned with respect to the outer tubewhereby the crest of the outer corrugations of the inner tube will abutagainst the crest of the-inner corrugations of the outer tube. v

2. A tire comprising inner and outer tubes formed of sheet metal, saidinner tube having a flat base and its remaining portion longitudinallycorrugated throughout, said outer tube being split and bent uponitselfto provide its ends with outwardly projectin'g flanges, said outer tubehaving its sides longitudinally corrugated and further including a flattread surface, said tread surface formed with transversely extendingribs providing means for securing a tread to said surface thecorrugations of the outer tube being alternately disposed with respectto the corrugations of the inner tube, said inner tube positioned withrespect to the outer tube whereby the crest of the outer corrugations ofthe inner tube will abut against the crest of the inner corrugations ofthe outer tube.

In testimony whereof I afiix my signature in the presence of twowitnesses.

- CHARLES H. LAPPE. I Witnesses:

MAX H. Snonovrrz K THERINE Ennn'rr.

